Carbureter.



W. OTTAWAY.

i GABBURBTEB. APPLICATION FILED SEPT. Z9, 1906.

Banted May 24, 1910.

'l 959,066.vv

4 SHEETS-SHEET 1.

w. OTTAWA'Y.

GARBURETER.

APPLICATION FILED SEPT. 29, 190B.

959,066. Patented May 24, 1910.

'ISHEETS-SHEET 3.

"ill mun l' lllllmlllllllm... Illllik UNirnD STATES PATENT' ori-Fiora.

WILLIAM OTTAWAY, OF AURORA. ILLINOIS.. ASSIGNOR TOAURORA AUTOMATIO MACHINERY COMPANY, OF AURORA. ILLINOIS, A CORPORAIION OF ILLINOIS.

CARBURETER.

Specification ot Letters Patent.

Patented )Iay 24, 1910.

To all whom it may concern.:

Be it known that I, WILLIAM Orixtivai, a citizen of the United States, of Aurora. in the county of Kane and State of Illinois, have invented certain new and useful Improveniente in Carbureters; and I do hereby declare that the follovviiet is a full, clear,

l oarbureters euch are employed in conneclao tion with internal combustion inotors, and more especially to nie-.ineI for regulating or controlling 'the proportion of air and vapor in the explosive mixture produced in the op-' eration of the carbureter.

The invention consisteI in the matters hereinafter describedand set forth in theappended claims.

In .the accompanying drawings which forni part of this specicatio1i,-Figure l is a vievv in side elemtion of a carbureter enibodyiiig my invention. Fig. Q. is a vieiv in central, vertical section thereof, taken on line 2 2 of Fig. 3. Fig. 3 is a View in central vertical section thereof, taken on line 3-3 of FigzvQ. Fig. 4 is a plan section, taken upon line 4 4 of Fig. 3. Fig. is a sectional View lookingupivardly, taken on line 5--5` of Fig. 3, Fig. G is a plan section, taken upon line G-G of Fig. Q. Fig.` 7 is a detail section, taken upon line 7-7 of Fig. 2. Fig.

' 8 is a detail section, taken upon line 8-8 of Fig. 2. Fig. 9 is a face view of a disk shown in Figs. 2, 6 and 7. 'Fig 10 is a vien1 of the valve-bushing as developed uponl a plane surface. Fig. 11 is a view of the rotative` cylindric valve member likewise developed fon a plane surface. Figs. 12, 13,' H and l5 are like views of the said bushing and cylin- -dric Valve member in superposed relation.

showing different relative positions of said Parts-z As shown in the said drawings, l indicates the outer cylindric vvall and 2 the inner l Acylindiic yvall of an annular chamber or reservoir for the liquid hydro-carbpn. The said inner Wall 2 consists of aii'npright tube or cylinder arranged centrally within the outer Wall l, Which-latter is provided with passage extending upwardly from its lower an inwardly extending annular ange y l n l which forms the bottoni Wall 'pf the reservoir-t end and communicating by radial holesl with 110 ,with a screw-plug' 11 having a conical head reservoir, which latter is provided with an annular top vvall or cover l. The cylinder 2 opens at its bottoni into'a horizontally disposed air chamber 5 vvhich is located below the reservoir and vwhich has at one sidel a flaring mouth-piece tlforniing theair inlet opening of the carbureter and the upper and loiver ivalls of which are inade of concaveA forni at their edges to tit the outer surface of the poiver cylinder of the motor, to which the carbureter is usually attached. Such air inlet opening formed by the mouth-piece is located closely adjacent to the vvall of the motor cylinder so that'the air dravvn into the carbureter may be heated contact with said cylinder. Centrally ofcth'elovver part. of the cylinder 2 is located a holloyv 4.upright post or feed tube 7 which is supported at its lower end from the bottoni vvall 3 of the reservoir by means of radial arnis S (Fig. et). The outer cylindric vvall l, and the bottoniy vvall 3 of thev reservoir, together' vvith the feed tube 7 and itssupporting arm 8, are preferably .cast in one piece or integral withA each other.

The interior of the feed tube 7 is connected at its lovver partby means of a radial passage"9, passing' through oneof the arnis S, with a hole in the v'fbottoin of the reservoir, said passage 9With :die feed tube forming a coiiduit by which the liquid is conducted fronrtlie-reservoir to exit openings at the top of said f d tube `Where the liquid is discharged andeaporized. Said feed tube 7 is shoyvnv'as extended at its loiverend downwardly through the bottoni Wall of the airVA chamber 5 and as provided at its loyver end with a screw-plug l0 which closes the bottoni of the saidV feed tube and may be re- 'moved foipcleaning the interior thereof.`

Said feed tube 7 Ais provided at its upper end '100 which tits a. conical seat in the upper end of the feed tub7. Inthe outer face of said conical head are provided a plurality of sniall grooves forming passages 12 through o which `the liquid is discharged. Said plug 11 is shown asH having screw-threaded en' gagenient at itsslovver part with the interior of the postand as provided yv`i`th`a bore or anannular space 'formed between the upper pagt of the plug and'the surrounding feed tu e.

The details of construction in the upper part of the feed tube 7 and plug 11, above referred to., are not in themselves novel, having been heretofore employed in carbureters.

At one side of the reservoir is located a vertical tube 13 which opens at its upper end into the reservoir and depends from the bottom wall thereof. llVth the lower end of said tube" 13 is connected, by a screw-threaded connection, a coupling member 14 -the lower end of which'is centrally apertured .and adapted for attachmentof a supply pipe through which the liquid is supplied to the carbureter. lVithin said tube 13 is located a hollow orv tubular plug 15 having' near its lower end an internal, upwardly facing, conicaly valve seat. Said plug 15 has screw; threaded engagement with the interior of the tube 13 and is thereby made adjustable vertically in said tube.' On the lower end of said plug 15, below the tube 13, is located a nut or screw-collar 16 having a conical uper end adapted to lenter a conical seat ormed in the lower end of the lug 15. Said screw-collar is provided. with at faces for the application of a wrench Vand consti-A tutesv a jam-nut which', when screwed up'- wardly on the plug intocontact 'with the lower end of the saidtube 13, serves tohold or lock the plug from turning in the tube. The tubular coupling member 14 is made of sufficient size or diameter at its upper part `to receive the lower end of said plug and the sleeve thereon. The inlet opening at the bottom-of the coupling member is shown as provided with a wire screen 17 of fine mesh to constitute a strainer to prevent the passage from the supply pipe to the reservoir of particles of dirt or the like.

Tithin theV screw-plug 15 is located a valve'stem 18 having a conical lower .end

'which forms with the 'valve seat within the plug 15 a valve by which the admission of liquid to the reservoir is controlled. The valve ste1n'18 is ia'ttened at its sides or fluted longitudinally `to permit the passage of liquid between the same and the surrounding Vwall of the plug.

lVithin the annular reservoir located a hollow, cylindric float 19 having freevertical movement therein. In the lower .partof the reservoir is locateda lever 20 which is pivotiilly connected by means of a horizontal jiivot pin QQ with a bracket 21 which is attacliij'd to and rises from the bottom wall of the ilservoir. Said lever 20 is provided .with tw curved arms Q3,- 23 that extend at op])osite' fsides of the cylinder :2 and are pivotally connected by means of transverse horizontal pivots 24, Qt. Fig. f-l. with depending arms or brackets 25 on lthe bottom of the ioat 19. At a point outside of the pivot Q2,

the said arms 23, 23 of the lever Q0 are vse- I cured to a single horizontal arm 2G, the outer end of which is connected with the upper end of the valve stein 18 by meansofa horizontally arranged, longitudinal slotin the end of said arm 2G, which is engaged by a pivot pin 2T passing .through the forked upper end of the said valve stein. The bracket 21 is provided with a horizontal base-plate which is .secured to the bottom wall of the reservoirbyl means of a screw inserted through'saidhottom wall, .as clearly seen in Fi 3. Said bracket 21 consists of two arms ormed on or bent upwardly from the base-plate, and which are connected by a horizontal tube Q8, through which' -the pivotl 22 passes; the ends of said pivot being secured in the parts of the arms Q3, E23 which are 'located at opposite sides of the said bracket.

The bracket 21 thus formed by thel Abase-plate, the two upright arms thereon and which is attached to the float and has two dek pendingr parallel arms laterally separated from each other and connected by a horie zontal tube 29 (Fig. Q). rl`he pivot pin 2l passes through said tube 99 and is secured at its ends in 'parts of the arm 23, which latter is bent at its end into U-form so' as to extend at the inner side of'.the bracket Q5, and then outwardly around said bracket, with its outer end bent back into a position parallel with the main part of the arm and outside of the bracket, as clearly seen in Fig. 4. The arm 23 is thus arranged to embrace the bracket gv the pivot. pin 24C being secured m the parts of the arm which extend inside and outside of the bracket at the ends of the tube Q9.

vided, above the tube 13, with a lateral chamber 30 which communicates with the body of the reservoir by a slot in the cylindric outer wall of the latter and is adapted to receive the upper end ofthe valve stem 18 -and the adjacent end of the lever Q0. Said cha-mber 30 is extended upwardly, in the form of a seini-cvlindric wall 31, to a point nea-r the top of the reservoir,.. the said side wall of which is provided with a slot between the side edges of the wall 31, so that the latter affords a vertical groove or channel extending upwardly from the inlet passage outside ofthe float, 19. The chamber 30 is 'provided with an opening opposite the end of the lever 20. which opening is closed by a screw;

by connection with the end of the inner tube which surrounds and has screw-threaded en- -T inwardly vagainstthe upper part oi' the y arranged that when the litlguid inthe reserlevel, the weight 't'or the entrance of an additional supply of of the float on the lever 20 effects the closing 'of the valve stein 18.

the float., will depress the latter. The float and connectedparts may" thus be moved t0 the motor or at other times:

llttached to the said valve casing 35 and `projecting downwardly therefrom, concenytrically within the cylinder 2, is a. cylindric tube 3G. The lower end of said tube 36 the top of the said feed tube, through whichv air is drawn upwardly from the interior of the cylinder 2 into the tube 36, which latter p 'u forms the vaporizing or vmixing space or lsages 12, 12 at the top of- The normal level of the liquid in the reservoir is approximately at tliediscliarge passages of thefeed tube .7. The float 19 is so voir falls below .the norma 4 of the float, acting on the lever 20, lifts the valve stein '18 and opens the admissionl valve liquid. As soon as the level of the liquid reaches the desired height, the upward pull of the valve through downward movement Located in the top wall 4 of the reservoir is a vertically sliding pin 33,' the lower end' of which rests on one end oafleaf spring 3l, (Fig. 5) which is attached at its opposite end to said to wall and holds pin norinally elevatet. By prsing down on the upper end of said pin, the 'lower end thereof wil force downwardly the free end of the spring 3-1, which, by acting'on the top of ascertain they bein working condition, or for ladmitting an additional suI ply of liquid to the reservoir when desire for 4starting 35 Yindicates a. valve casing which is attached to the top of the reservoir preferably 2 which projects above 4the top wall 4 of said reservoir. l The upper part of saidv valve casing has 'the form of ahorizontally arranged cylinder, while its lower part consists of an upright cylindric pai't. or neck gagement with the upper end ofthe cylinder surrounds the upper end of the feed tube 7; thereby forming an annular space or passage between the lower end of said tube 36 and chamber of the carbureter. Vaporization of the hydro-carbon dischar d from the pas- '.e feed tube'takes vplace by reason of the air being drawn upwardlythrough said annular space around the top of the feed tube and past the discharge openings 12, 12 thereof. Said tube 36 is provided, at a point below the disjecting annular rib 69 preferably formed b v depressing the metal of the saidtube L from the exterior thereof. Such annular rib serves to throwv or detiect the air which y rises betweeii.tlie tube 3G and feed tube said feed tube at which theopeiiings of .said l ter is provided with a laterally extending pipe 37 which 'is connected with tlieinlet` port of. the' motor cylinder and communicates with the-interior of the valve casing.

vvlVithin the valve 'casing is a horizontally arranged lcylindric valve member 38 having ports which coperate with ports in the valve 1 casing to control the quantity of the explosive mixture drawn from the ca rbuieter to the motor cylinder 'andl also tocon'trol or regulate the .admission vof an auxiliary air supply forvarying the proportioiisof air and vapor in the mixture. The said valvemember 38 has turning or rotative moveiment in the casing for the purpose of con? y trolling 'the passage of the mixture from the valve casing to the.V pipe 3T and for 'varying the auxiliary air supply to correspond with the quantity of the mixture? delivered to the -motor, andsa'id valvel member also has endwise adjustable movement inthe said casing for the purpose of varying the auxiliary an` -supply to give a greater or less proportion of vapor in the mixture. Tlieports in thc` valve casing, as shown in the accompanying drawings, are not formed in the valve casingA itself, but in a cylindric bushing 39 which is fitted and secured immovably in the upper or cylindric part of said casing, such separat-e bushing being employed for convenience in making or forming the ports and in order to enable repairs to-be easily madein case of the parts becoming worii. As shown in the drawings, the cylindric bushing 39 is shown as'held in place within the valve casing, by means of a screw-stud l0 (Fig. 2) inserted through the casing -and thebushing. Said stud 40 is shown as also adapted to forma stop to limit thel movement of the valve member 38, the stud forthis purpose being extended inside of the surface of the bushing into 'a slot 58 formed in the valve member. Topermit both rotating or oscillatory and endwise sliding movement of the valve-ineinber 38 in the valve casing, the said slot 58 is extended both lengthwise and circumferenwords, made of a length and width required for giving the maximum eiidwise and oscillatory movement 1n said valve member. The sai'dvalve member 38 is closed at one end by a head 41 which is rigidly attached therechai-'ge passages 12. with an inwardly proto and fits at its margin within a cylindric seat formed in the end of the valve casing. Said head 41 is proyided with arigidly attially of the valve member, or in other tached operating arm 42 through-Which rov-tative movement is given to the valve. y At its opposite end the' valve lmember `3.8- `.is closed by a rigidly attacheddisk or head 43, provided with a central, outwardly attend v mixture dravvn from the tube 36.

j leave uncovered or open the port 45.

ing stem 44 through the mediumof which endu'lse movement is given to the said valve member. Y i

The valve bushing 39, as more clearly seenin Fig. 10, in which the said bushing is developed on a plane surface, is provided with four ports or openings, to-Wit, a circular port 45 communicating With the interior of Vthe tube 36, as clearly seen in Fig. 2, a port 46 preferably of rectangular form, which Vcommunicates with the exit pipe 37, as

clearly seen in Fig. 6, and two ports 47 and 48 arranged in endWise alinement with the port 45 and Which communicate with the upper end of the annular space between the cylinder 2 and the tubfe 36, as clearly seen in Fig. 2. The mixture of air and vapor produced in the tube 36 by the vaporization of the liquid issuing from the feed pipe, is drawn into the valve chamber through the port 45, Which is always open. The ports 47 and 48 constitute the auxiliary air supply ports; air from the interior' of the cylinder 2 being drawn through the same and being intel-mingled in the valve casing With th the valve member so as to also coperate with the air supply port 47. The port 50 is arranged to coperate with the air supply port 48. The margin 51 of the port 49 is adapted to overlap to a greater or less extent the port 46, when the valve member is turned, to afford a larger or smalleropening or area for the passage of the explosive mix ture from the curbureter to the engine. This action of the valve is notatfected by the endvvise adjustment of the valve member 38; the end of the port 49 adjacent to the said margin 51 being made so much Wider than the port 46 as to enable the valve member to4 be shifted endvvise tothe maximum extentl of its adjustment lWithout V.narrowing the opening of said port 46. The laver-alextension of the port 49 which coperates With the port 47 has its side margin stepped or` offset to form a transverse edge 52 parallel iv-'ith the'jmargin 51 and'equal in length to the extent of the endvvise adjusting movement of the valve member. Said port 49 Jhas tivo longitudinal or circumferentially extending margins 53 and 54 located at opposite sides-ot the transverseedge. 52, and so disposed laterally that the margin 53 coincides lWith the outer margin of the port '47 in one extreniefadjusted position of the valve member, While the mar-gin 51: coincides vWith the-inner edge of said port 47 at the opposite extreme adjusted position of said valve member.- The port 50 is narrower vat one end than theotherfbeing .provided at its side corresponding with the stepped side of the port 49 with an intermediate transverse edge or'shoulder 55, in line .with the shoulder 52,

tion, While the margin 57 is adapted to co. incide with the outer margin of the said port 48 when the valve member is at the extreme limit ot its endtw'ise adjustment in the opposite direction; The stepped margins 52,53 and 54 of the port 49 may constitute one side of a third port,separate from the ort 49, and correspondin in shape with the port 5(1); the construction illustrated, by which the central port l49 is combined with one of the lateral or auxiliary air ports, being used merely for compactness and convenienceyof construction. In the turning of the valve to vary the eective o ening of the ort 46, and thereby regulate t e quantity o explosive mixture passing to the motor,..it opens or closes to a corresponding extent the auxiliary airsupply ports 47 and 48, so that the same proportlons'of vapor and an' are maintained in the mixture in all ositins t0 which the valve may be turn Endwise adjustment of "the valve member, by the shifting of the margins 53 and 5'4 of the port 49 relatively tothe port 47, and by the like Y shifting of the margins 56 and 57 of the port 50 .with respect" to the port 48, operates to give greater or less auxiliary air supply through said ports` 47 and 48,'to vary the proportions otair and vapor in tHe mix.-

ture.V y l j j Figs. 12 and 13 show the valve member and the bushing in superposed relation in both cases with the -valve member turned to its nearly open position'; Fig. 12 shows the valve member adjusted to onelimit of its endwise movement to 'vejmaximum auxiliary air suppl and Fig. 13 shows the valve adjusted tot e opposite limit of its end- Wise movement to give maximum auxiliary air supply. Fig. 14 shows the valve mem-v transverse edges 52m'nd 55 of the ports 49- and 50 Will, as the valve member is turned,

`overlap to a greater or less extent the ports 48 and 47, thereby increasing or decreasing the effective areas offsaid ports 47 and 48,

and. increasing or ldecreasing the auxiliary air supply to correspond .with the degree.

of opening of the main or enit port 46. The saine operation takes place when the valve member is shifted or adjusted to the position giving maximum auxiliary air supply, 'as seen in Figs. 13' and 1,5. In this ease, when the porte-G is open, or nearly open, tlie ports 47 and 48 will also be nearly open, as.

seen in Fig. 13, and ,when said port ttl is closed, or nearly closed. t-lie effect-ive' areas of the auxiliary poi-ts will be such as to give the maximum proportionate air supply required foisuch nearly closed position, as seen in Fig. 15. In intermediate adjusted osition of the valve member 38, the effective 'areas of the auxiliary air supply ports 47 and 48, at. intermediate points in the turning movement or throw of tlie valve member7 will be determined by the lateral justed endvvise to the position shownI iii Figa 12, giving minimum air admission, the turning of the valve from the fully open to the closed position of tlie outlet port, will have the effect of reducing the air admission ports from an intermediate etfective area to complete closure, and when said valve member is adjusted to its position shown in Fig. 13` .like turning movement of the valve will reduce the air admission ports from maximum effective area to an intermediate eileetive area, leaving them partially open when the outlet port is fully closed. Moreover, when the valve is adjusted endivise to the position giving maximuni air-supply, or to a position giving intermediate air-supply,'a portion of the area of eacli air-supply port Will be' Constantly open or unaffected by the movement of the margin of tlie valve member over the saidy air port, and the amount of air-port area affected b v the turning movement of the valve Will be different in its different positions of endivise adjustment. lt follows that, tvliilc tlie rate of enlargementI and con-v traction of eacli air supply port Will be uniform for any one position of endivise adjustment. vet such endvvise adjust-nientivill increase and decrease the total effective airport area uniformly, or will affect t-lie airpoit area to an equal extent, in all positions of rotative adjustment of the valve. ln

other words, rotative adjustment of tlie valve to give increased air-supply ivill afford uniform increase for all positions of Such rotative adjustment, while endivise adjustment to give `greater air suppl)v Will afford equal increase of air-supply in all poeeaoee sitions of rotative adjustment, from the I v I rally Vopened to fullyclosed condition of the outlet port, Y

n a'oiv referring to the means illustrated for etfecti g endvvise adjustmentof the valve meinliei 58 devices or this purpose sie provided une being more clearly' shown in la? a, t5, l?, tl and 9. The end. of the Valve e, ing 35 adjacent to the lieid -13 is provided'with a neel.; orfcyliiidrieextension 60 which is externally screw-threaded to receive secreta-threaded cap (il. ll'itliin the neclt @0 and cap 6l is located a cylindric sleeve 62 which surrounds the stem #il Von said liead e3, and Within 'which said stem is adapted to freely turn when the valve member 38 is turned in the valveleasing, Said sleeve o2 is connected with the cap 6l so as to rotate and move Iii-divise therewith and is lield fir-om endi e movement relatively to the stem by a 'connection atfording free rotative movement of tlie sleeve relatively 'te' said stein. The said sleeve 62, at kits inner end, slides in a central opening in the casing head and has an outwardly eX- Witli an annular seat on the casing head, limits the outward endivise movement of said sieveu Said sleeve G2 also provided at its outer end with an outwardlyextend.- ing annularflange. The outer end of the stem projects beyond the outer end of the sleeve and is provided Twith an annularV groove 63 which is adapted-to be engaged by a plate or dislt'tl (Fig. 9) havinga radial notcli or slot adapted to receive .the reduced Ipart of the stein Lil formed by 'the said groove 63. The cap is attached to the sleeve by means ofjsereivstltl, 66 inserted through tlie said cap and passing through notches (S7, 67 formed in the o iposite sides of tlie disk (il and into the iange at the outer end of said sleeve. Said disk is, by

Said spring (i8 is thus arranged so as to G2 and the cap 6l, to which said sleeve is attached, 'tending to force tlie said cap out wardly and' thereby produce frictional resistance to the turning of the cap on the casv ing.' rlie will, therefore, always remain in its adjusted position and vvill not partake of tlie turning movement of tlie` valve member 38 and `its stem 4i, ivliicli is engaged with said cap tlirouglitlie medium of *die the said screws 66, 66, firmly held or clamped ing shoulder formed Within tlie neel;

exertconstant outward pressure on the sleeve,

tending annular flange ivliicli, by its contact 'disk 64. Saiddisk C4, provided with the ably provided with a lstud 69 adapted to enter a hole in the iianged outer end of the sleeve '62 so as to hold the notchesvof the said disk in register with the screw-holes in the sleeve, to facilitate the insertion of the -said screws 66, 66.

-Endvvise movement vof the valve member 38 is eii'ected by the turning of the screw cap 6l on the screw-threaded neck 60, in ward and outward movement of said cap being transmitted to the valve stem through the medium of the disk 64, which is secured to the cap by being clamped between the same and the outer end of the sleeve 62, and

which is engaged with the groove in the outer end ol said stem 4a in the manner hereinb'etore described. The spring (3S, exerting constant outward pressure on the cap, not onlyservs to prevent the cap from turn- 'in with the valve member 38, but also from being accidentally turned or shifted by the jarring of the parts in the operation of the motor to which the carbureter is attached.

It will be observed, from the construction described, that the main feature of my invention, so far as the feature of air regulation or control is concerned, is a throttle or controlling valve having turning or rotative movement for effecting regulation to give greater or less supply of explosive mixture to the motor, and corresponding variation in the auxiliary air supply to the carbureter, which v'alve has adjustment in the direction of its axis of rotation for the purpose of varying the proportion of the auxiliary air supply admitted to the carbureter.

The features of construction-hereinbefore described and shown in the drawings in connection with meansfor regulating or controlling the supply of liquid hydrocarbon to the spaceor-chamber of the apparatus in which the liquid is vaporized constitutes the subject of a separate'application for Letters Patent, `filed by me on'the lthday of May 1907, Serial Number 372,846.

I claim as my invention j 1. In a carbureter, a valve embracing a valve casing provided With an outlet port v and an air supply port, and a hollow cylindric valve member in said casing adapted to4 l turn therein for simultaneouslyl increasing and. decreasing the effective areas of said outlet and air supply ports and-having endwise vadjustment therein for varymg the effective area of the airsupply port without changing that of said outlet port; the part of said cylindric valve member which cooperates Wit-h the admission port being provided vvith c-ircumt'erentially and axially extending vvorking margins, so arranged as to increase and decrease the area of said airport, in the rotative adjustment of the valve member, to correspond with the increase and decrease of the outlet port, and acting by the endvvise adjustment lof said valve member, to afford an increased or decreased effective area in said air-port, in all positions of rotative adjustment of said valve member.

2. In a carbureter, a valve comprising a valve casing having an outlet port and an auxiliary air supply port, and a hollow cylinder valve member in said casing adapted to turn therein for simultaneously varying the effective areas of said outlet and air supply ports, and having endivise adjustment in said valve casing for varying the effective area of said air supply port Without changing the eiiective area of the said outlet port; the port of said valve member which cooperates with the admission port having a plurality 'of circiunferentially extending Working margins located ata distance apart in a direction endvvise of the valve 'member and acting to give either an intermediate or minimum effective area to the auxiliary air supply port when the outlet port has minimum etective area and to give either an inv termediate or maximum effective area to the auxiliary air supply port .when the outlet port has maximum effective area. y

3Q In a carbureter, a valve embracing a valve casing provided with an outlet port and with an auxiliary air supply port and a cylindric valve member in said casing apertured to co-act with said ports, and having its part which coacts with the said auxiliary air supply port stepped or oli'set at its margin to form tvvo working margins extending in a direction circumferentially of the'cylindric valve member and located at a distance apart in a direction endivise of said valve member, said valve member having turning movement in the valve casing to simultaneously open and close said ports, and end- Wise adjustment in said valve casing for shifting or moving said stepped oroffset marginal part relatively tothe auxiliary .air supply port, and to thereby vary the eli'ective areal of said port. l' .y l

4. In a carbureter, an Aupright tube yconstituting a rcarbureting chamber, a valve casing provided' Wit-li a port connecting the interior of-sa'id casing with the top of said tube. with an outlet port and vvith an auxiliary air supply port opening to a space outside of said tube, and a rotative cylindric valve member in the said casing having its Y -axis of rotation transverse to the central axis of said upright tube and adapted to turn in 'said casing for simultaneously increasing and ldecreasing the effective areas of said outlet port and auxiliary air supplyl port.,

said valve inembfer having endwise adjust-l ment in said valvecasing for varying the effective area of the auxiliary air supply portf,

,that of said ,outlet port;

Without changinV cylindric valve member the part of sai which cooperates with the admission port 'beiiiff p-iovidedvvith vcii 'ciimferential1y and axially extending working margins, so arranged as to increase and decrease the area I* of said air-port, in therotative adjustment .r valve member. 2 0

of the valve member, to correspondJvith the increase and decrease of the outlet port, and acting -by the endiviseadjust-ment of said valve member, to afford an increased or decreased elective areax in said air-port, in alll positions of rotative adjust-ment of said 5. A cai'bureter comprising an upright cyl- -inderopen at its bottom, an upright feed tube iii-the loiver part of said cylinder, a tubel the space l'ietvveen the upper end of said cyl-- -constituting'a carbureting vchamber located in the upper part of said cylinder, open at its lovver` end and surrounding said feed tube at itssaid lower end, a valve casing. to Whichsaid' cylinder and the tube are attached, at their upper ends, said valveocasing being provided with an outlet port, with an'inlet port communicating witlthe interiorof said tube at its upper end, and with an' auxiliary air supplyrport communicating with' thel upper 'end of the space between the s'aid cyl luder-aud tube, and a cylindricvalve inemy ber in said casing adapted to turn therein-- for simultaneously opening and closing said outlet port and said auxiliary airisupply) port -and having endwise adjustment therein for vai'ving the effective area of the auxiliary 6. In a. carbureter, an upright cylinder l. open at 'its bot-tom, a tube constituting a carbureting chamber located at the upper part ofsaid cylinder, a valvel casing to which inder and tube, and a cylindric valve niember in said cas-ing' adapted'to turn therein to .simultaneously vary the effective areas of the outlet port and said auxiliary air suppl v port and having endwise adjustment therein for varying the effective area of the auxilia'rtv air supply port.`

T. In a carbureter, a valve ,embracing a valve casing provided ivithv an outletport i -and `ivitli'- an auxiliary air supply port, ya Ci-'lindric,valve member; in said casing adaptedito' turn tlie-r'ein for simultaneously increasl ing and decreasing the effective areas of said ,ing said endivise adjustment of thevalve member, said cap having screw-threaded enports and having endwise adjustment therein for varying the ueffective area of the auxiliary air supply port, 'and'means for giving endwise adjustment of said valve member in 4the casing embracing a rotative `--and endWise movable part mounted on the exterior of the seid casing, and'means connecting said rotativel part with the valve member permitting` relative rotation of said rotative member and the valve member.-` j

8. Ina carbureteiy-a valve embracing a valve casing, provided with an outlet port and with an auxiliary'air supply port, a cylindric valve ineiiiber in said casing adapted to' turn- 'therein for simultaneously opening and closing-[said ports and having -eiidwise adjustment therein for the purpose of varying the effective area of the auxiliary Aair supply port,'a rotative cap for accomplishgagenient .vitli said casin'fr and being connested with the valve member' by means permitting relative rotation oftl'ie valve member and cap.

9. Iii a carbureter', a valve embracing a valve casing provided with an outlet port and ivith an auxiliary air 'siipply poi"t, a cylindric valvemember in said casing. adaptedto turn therein for simultaneously .opening and closing said ports and having endvvise adjustment 'therein for varying the effective area of the auxiliary airsupply port, a rotativ cap for accomplishing said endvvise adjustment of the-valve member, said cap having screw-threaded engagement with said casing and being connected vvith the valve memberl by means permitting relative rotation of the valve member aiidcap While pre-- venting relative en'dvvise movementof said parts, and means affording iictional iesistance to` the turning of the cap on the said casing. c

10. In a carbureter, a valve embracing a valve casing having an outlet poi'tl and an auxiliary air supply port, a rotative, cylindricval've member in said-casing adapted to turn therein for simultaneously opening and closing'isaid ports, and having endivise adjustment therein for varying the effective areaof the auxiliary air supply, port, a rotative cap on said casing for accomplishingt-lie endivise adj ustnien-t of said valve member, said cap member being connected with the valve member by means permitting`tlie 'turning of the valve member relatively to the cap. for producing endivise movement to the valve ineiiibei `ivitli tlie cap, and a rspring iiiteiposed betv:een the valve casing of the' can and acting on the latter to afford frictional resistance' to the turning ofsaid caplontlie valve casing.

l1. In a carbureter, the combination of a valve casing having an outlet port and an auxiliary air supply port, a rotative .and

endwise movable, cylindric valve ineniber in said casing adapted to turn in said casing for simultaneously opening and closing said ports and having endwise adjustment therein for varying the elective area of the auxiliary air supply port, said valve memberv being provided at one end with an axially extending stem, a rotative cap for effecting the endwise adjustment of said valve member, said cap having screw-threaded engagement with one. end of said valve'casing, a connection between the said cap and the outer end of the stem permitting relative rotation of said parts, and a coiled spring interposed between the said cap and the adjacent end ot' the valve casing.

l2. In a carbureter, the combination with a valve casing, of a cylindric valve member having rotative and endwise movement in said` valve casing and means for effecting endwise adjustment of the valve member in the casing embracing a rotative cap applied .to one end of said valve casin and having screw-threaded engagement terewit-h, an aXial stem on the valve member provided with an annular groove, and a disk secured to the inner face of said capv and having a radial notch for engagement with the groove of the valve stem. 13. In a carbureter, thecombination with a valve casing, of a cylindric valve member having rotative and endwise movement in said valve casing, and means for eifecting endwise adjustment of the valve member in the casing embracing a rotative cap on `said valve casing having screwthreaded engagement therewith, an axial stem on the valve member provided with an annular groove, a

' sleeve surrounding said valve stem and having sliding engagement with the valve casing, said sleevebeing provided with a flange at its outer end, a disk radial notch for engagement with the groove in said stem and having its marginal part located between the outer end of said sleeve and the inner face of the cap, and screws securing said cap and disk to the said sleeve.

provided with a 'P 14. In a carbureter, the combination with a valve casing, of a cylindric valve member having rotative and endwise movement in said valve casing, and means for effecting endwise adjustment of the valve member in the casing embracing a rotative cap on said valve casing having screw-threaded connection therewith, an axial stem on the valve member having rotative connection with said cap, a sleeve surrounding'said valve stem and having sliding engagement with the valve casing, said sleeve having a flange at its outer end' and being attached at said outer end to said cap, and a coiled spring surrounding said sleeve between an outwardly facing shoulder on the valve casing and the flange on the sleeve.

15. In a carbureter, the combination with a valve casing, of a cylindric valve member havingk .rotative and endwise movement in said valve casing, a rotative cap on said valve casing for effecting such endwise movement of `the valve member, said cap having screw-threaded engagement with the casing, an axial stem on the valve member provided with an annular groove, a sleeve surrounding said valve stem and. having sliding engagement with the valve casing, said sleeve being provided with a Harige at its outer end, a disk provided with a radial notch for engagement with the groove in said stem and having its marglnal part locatedbetween the outer end of said sleeve and the inner face of the cap, screws securing said cap and disk to the said sleeve, and

a coiled spring surrounding the said sleeve between an outwardly facing shoulder on the valve casing and the flange on the outer end of said sleeve.

In testimony, that I 'claim as my invention I aiiX my signature in the resence of two witnesses, this 25th day of September A.

WILLIAM' OTTAWAY.

Vllitnesses:

` Enw. GUs'rArsoN, N. J. LINDEN.

.the foregoingv p i 

